WIP: invoke #1898

Job	Run time
Performance (hand_written)	47m 33s
Performance (inter-AD)	25m 39s
Performance (derived)	14m 55s
basic	12m 13s
rrules	18m 0s
integration_testing/misc	45m 24s
integration_testing/diff_tests	9m 22s
integration_testing/distributions	9m 17s
integration_testing/gp	22m 44s
integration_testing/special_functions	4m 57s
integration_testing/array	13m 38s
integration_testing/turing	14m 4s
integration_testing/temporalgps	7m 1s
interface	5m 31s
	4h 10m 18s

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